I have an OpenGL(3.3)+GLEW application.
I want to draw a black vertical rectangle at the left side of the window for writing some information on it, like fps (I use GLEW function for drawing text).
...

How do libraries like OpenGL convert three dimensional coordinates into the two dimensional pixels we see on our screens? I'm not talking about the 3DS or games that require 3D glasses, but rather the ...

In my game there is a bird flying and on touch it throws different artifacts projectile downwards. And these artifacts should hit the containers moving right to left on the screen. Now if user keeps ...

This semester I both took a computer vision and a computer graphics seminar. But only now before the exams I realize that there seems to be a fundamental difference between projection in both topics.
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For various reasons – partly educational, partly technical – I'm writing a 3D game engine from scratch, using OpenGL 3.0; aiming for Core Profile, eventually, so of course I'm using a custom matrix ...

I'm looking for a way to create a 3D earth in Flash, something like the wonderful SolarSystemScope, only in my map the countries should be clickable and whatnot. To get started I've got map data from ...

I have an orthographic camera that looks like this:
I create 2d polygonal meshes that have uniform z values in their vertices. I use Camera.ViewportToWorldPoint() to map these viewpoint vertices to ...

I am currently writing a simple 3D space visualisation program.
Things get loaded into it from a simple XML file, which contains positions and sizes of objects in space, so you can put basically any ...

I am trying to implement do some screen space rendering but after looking over the web I still don't find answers to some doubts.
First, I need to compute the point in view space from a value in the ...

i Rendered My Sprite With 72 Angles In Isometric View.
Rendered Frame Number 0 And Angle 0 Is When My Sprite Looking Right And And I Rendered My Sprite Every 5 Angle.
In My 2D Game My Sprite Moving ...

I'm going to start with some background, so jump to my question at the bottom for the TLDR version.
Problem:
In a Japanese 4gamer article (english translation via Chev on Polycount) explaining some ...

Im developing a 2D game with some fake 3D effects (parallell projection).
2D-units are able to walk in front of buildings aswell as behind them, although themselves being just 2d-objects.
This leads ...

Whenever a camera is "far" away (its location is some "large" vector), trouble arises when rendering objects close to it: It is the classic precision loss from subtracting 2 floating point numbers.
I ...

I have been learning OpenGL for a while now and have a pretty good understanding so far.
What I would like to know is if I create a 2D game in Orthographic Projection, is it possible to switch to a ...

The question is pretty much in the title. Are there notable 3D projections other than orthographic and perspective that could be used in a 3D system such as OpenGL?
In particular, are there any that ...

I'm currently trying to write a C 3D software rendering engine from scratch just for fun and to have an insight on what OpenGL does behind the scene and what 90's programmers had to do on DOS.
I have ...

I'm writing a function that allows me to click on my tiles. The origin for my tiles is the center, however, the mouse's origin is the top left. I need a way to transform my mouse coordinates into my ...

I want to make a quick demo program showing a cube, or a user loaded model, rotating in screen rendered with one of three projections: perspective, isometric and cavalier.
Using the fixed pipeline, ...

I'd like to visualize a BSP tree. To do this, I need to project an arbitrary euclidean plane onto a projection plane. I was thinking about calculating the intersections of the plane with the viewing ...

I have a little LWJGL application and I have been trying to figure out how to successfully use the GLU.gluUnProject function in order to transform a given point on the screen (mouse position) to world ...

My question is not really a game development question, but since it's based on 3D programming, I thought it would fit best here.
I've got a line made out of Point3D objects where the value of x, y, ...

I am working on a 3d scene editor and would like to show the scene in orthographic projection. My current problem is that I am not sure how to calculate the orthographic projection matrix such that ...

I'm trying to use space in my shadow (depth) maps in a more efficient way. If I could freely rotate the final image I get with projection matrix I could save a lot of pixels, but I don't know if it is ...

We are building agame with orthographic view. The problem we face is the fact that with different resolution you can see different area of the game world. E.g. if you have higher resolution you can ...